Hi all:
we found that partial read will cause full stripe read in now ec
impl, for example:
we have 4 chunks per stripe, 4K size per chunks and 16K per
stripe, when we read rand 2K in a stripe,the reads
will amplify to full stripe(16K +8K(Parity))..
i did not see any checksum or buffer related factor except the ec
extentcache.does the extentcache is the purpuse of the mechanism?
now we want increase the stripe width to improve the small random raed
performance, but the mechanism limit the result...
best regards!
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